FURTHER ACKNOWLEDGMENTS TO Mr. R M. Johnstone for reading the whole manuscript and proofs; Lieut-Commander Geoffrey Rawson, R.LM. (retired), for his personal appreciation of Lieut. Bowers and for help with Chapters I, II and VI; Lady Shackleton for lending Sir Ernest's original diaries and letters, for permission to quote his books and for reading Chapters II, III, XI and XIV; Lieut- Colonel Sir Philip Brocklehurst, Bart., for checking Chapters IE and III, with other kindly help; Captain J. K. Davis, Director of Australian Navigation, for reading Chapters II and X, also for sending data, notes and memoranda; Mr. C. S. Evans, Manag- ing Director of Messrs. W. Heinemann, Ltd., for his gift of the Nimrod Scientific Reports; Dr. Charcot for presenting all his published works with permission to quote them, for sending photographs (most of which, unfortunately, we cannot reproduce), and for reading and endorsing Chapter TV; Captain Gjertsen for the trouble he has taken over Chapters V and XVIII; Commander Hj. Riiser-Larsen for being good enough to correct part of Chapter XVIII; Mr. Bjarne Aagaard for all his help in several chapters, as well as for permission to quote his monumental work; Rear- Admiral E. R. G. R. Evans, C.B., D.S.O., for his kindness in reading and correcting Chapters VI and VII, also for permission to quote his" South with Scott" ; Captain Victor Campbell, R.N., for reading Chapter VII; Dr. G. Murray Levick for the same and for contributing important memoranda and notes; Dr. W. Filchner for correcting Chapter VIII; Commander F. A. Worsley and Mr; R, W. James for lending their original Diaries of the Endurance Expedition with permission to quote them and for their ex- tremely valuable help in criticizing Chapter XI, as well as for sending memoranda; Rear-Admiral R. E. Byrd, U.S.N. (retired), who with the greatest willingness and courtesy has corresponded freely with the author, contributed valuable memoranda and given permission to quote his book, " Little America "; Captain H. K. Sdvesen, M.A,, for his letter, given in Chapter XV; Sir Hubert Wilkins for his kindness and consideration in checking Chapter